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Effect Latch. A3282 Datasheet

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Effect Latch. A3282 Datasheet






A3282 Latch. Datasheet pdf. Equivalent




A3282 Latch. Datasheet pdf. Equivalent





Part

A3282

Description

Chopper-Stabilized Hall Effect Latch

Manufacture

Allegro MicroSystems

Datasheet
Download A3282 Datasheet


Allegro MicroSystems A3282

A3282; A3282 Chopper-Stabilized Hall-Effect La tch Features and Benefits ▪ Chopper s tabilization ▫ Superior temperature s tability ▫ Extremely low switchpoint drift ▫ Insensitive to physical stres s ▪ Reverse battery protection ▪ Ou tput short circuit protection ▪ Solid state reliability ▪ Small size ▪ R obust EMC capability ▪ High ESD ratin gs (HBM) Description The A3282 Hall-e.


Allegro MicroSystems A3282

ffect sensor is a temperature stable, st ressresistant latch. Superior high-temp erature performance is made possible th rough an Allegro® patented dynamic off set cancellation that utilizes chopper- stabilization. This method reduces the offset voltage normally caused by devic e overmolding, temperature dependencies , and thermal stress. The A3282 complem ents the current Al.


Allegro MicroSystems A3282

legro family of chopperstabilized latchi ng sensors. The A3282 includes the foll owing on a single silicon chip: voltage regulator, Hall-voltage generator, sma ll-signal amplifier, chopper stabilizat ion, Schmitt trigger, and a short circu it protected open-drain output. Advance d BiCMOS wafer fabrication processing i s used to take advantage of low-voltage requirements, com.



Part

A3282

Description

Chopper-Stabilized Hall Effect Latch

Manufacture

Allegro MicroSystems

Datasheet
Download A3282 Datasheet




 A3282
A3282
Chopper-Stabilized Hall-Effect Latch
Features and Benefits
Chopper stabilization
Superior temperature stability
Extremely low switchpoint drift
Insensitive to physical stress
Reverse battery protection
Output short circuit protection
Solid state reliability
Small size
Robust EMC capability
High ESD ratings (HBM)
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
Description
The A3282 Hall-effect sensor IC is a temperature stable,
stress-resistant latch. Superior high-temperature performance
is made possible through an Allegro® dynamic offset
cancellation that utilizes chopper-stabilization. This
method reduces the offset voltage normally caused by device
overmolding, temperature dependencies, and thermal stress.
TheA3282 complements the currentAllegro family of chopper-
stabilized latching devices.
The A3282 includes the following on a single silicon chip:
voltage regulator, Hall-voltage generator, small-signal
amplifier, chopper stabilization, Schmitt trigger, and a short
circuit protected open-drain output.Advanced BiCMOS wafer
fabrication processing is used to take advantage of low-voltage
requirements, component matching, very low input-offset
errors, and small component geometries.
This device requires the presence of both south and north
polarity magnetic fields for operation. In the presence of a
south polarity field of sufficient strength, the device output
latches on, and only switches off when a north polarity field
of sufficient strength is present.
Not to scale
Continued on the next page…
Functional Block Diagram
VCC
Amp
Regulator
To All Subcircuits
Control
Current Limit
VOUT
<1Ω
A3282-DS, Rev. 8
GND





 A3282
A3282
Chopper-Stabilized Hall Effect Latch
Description (continued)
The A3282 is rated for operation between the ambient temperatures
–40°C and 85°C for the E temperature range, and –40°C to 150°C for
the L temperature range. The two package styles available provide
magnetically optimized solutions for most applications. Package
LH is an SOT23-W, a miniature low-profile surface-mount package,
while package UA is a three-lead ultramini SIP for through-hole
mounting. Each package is available in a lead (Pb) free version,
with 100% matte tin plated leadframes.
Selection Guide
Part Number
Packing1
Mounting
Ambient, TA
(°C)
BRP(MIN) BOP(MAX)
(G) (G)
A3282ELHLT-T2 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount
–40 to 85
A3282LLHLT-T2 7-in. reel, 3000 pieces/reel
A3282LUA-T2 Bulk, 500 pieces/bag
3-pin SOT23W surface mount
3-pin SIP through hole
–40 to 150
–150
150
1Contact Allegro for additional packing options.
2Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant
is currently restricted to existing customer applications. The variant should not be purchased for new design applications because
obsolescence in the near future is probable. Samples are no longer available. Status change: August 12, 2009.
Absolute Maximum Ratings
Characteristic
Supply Voltage
Reverse-Supply Voltage
Output Off Voltage
Output Current
Reverse-Output Current
Magnetic Flux Density
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
VCC
VRCC
VOUT
IOUTSINK
IROUT
B
TA
TJ(max)
Tstg
Range E
Range L
Notes
Rating
28
–18
28
Internally Limited
–10
Unlimited
–40 to 85
–40 to 150
165
–65 to 170
Units
V
V
V
mA
G
ºC
ºC
ºC
ºC
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2





 A3282
A3282
Chopper-Stabilized Hall Effect Latch
OPERATING CHARACTERISTICS valid over full operating voltage and ambient temperature ranges, unless otherwise noted
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Units
Electrical Characteristics
Supply Voltage1
Output Leakage Current
Output On Voltage
Output Current Limit
Power-On Time
Chopping Frequency
Output Rise Time2
Output Fall Time2
Supply Current
Reverse Battery Current
Supply Zener Clamp Voltage
Supply Zener Current3
Magnetic Characteristics4
VCC
IOUTOFF
VOUT(SAT)
IOM
tPO
fc
tr
tf
ICCON
ICCOFF
IRCC
VZ
IZ
Operating, TJ < 165°C
VOUT = 24 V, B < BRP
IOUT = 20 mA, B > BOP
B > BOP
VCC > 3.6 V
RLOAD = 820 Ω, CS = 20 pF
RLOAD = 820 Ω, CS = 20 pF
B > BOP
B < BRP
VRCC = –18 V
ICC = 6.5 mA; TA = 25°C
VS = 28 V
3.6 – 24 V
– – 10 μA
– 250 500 mV
30 – 60 mA
– 8 50 μs
– 200 – kHz
– 0.2 1
μs
– 0.2 1
μs
– 1.6 3.5 mA
– 1.6 3.5 mA
– – –2 mA
28 – – V
– – 6.5 mA
Operate Point
BOP South pole adjacent to branded face of device
70 110 150 G
Release Point
BRP North pole adjacent to branded face of device
–150 –110 –70
G
Hysteresis
BHYS
BOP – BRP
140 220 300
G
1 Maximum voltage must be adjusted for power dissipation and junction temperature, see Power Derating section.
2 CS = oscilloscope probe capacitance.
3 Maximum current limit is equal to the maximum ICC(MAX) + 3 mA.
4 Magnetic ux density, B, is indicated as a negative value for north-polarity magnetic elds, and as a positive value for south-polarity magnetic elds.
This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the eld is indicated
by the absolute value of B, and the sign indicates the polarity of the eld (for example, a –100 G eld and a 100 G eld have equivalent strength, but
opposite polarity).
DEVICE QUALIFICATION PROGRAM
Contact Allegro for information.
EMC (Electromagnetic Compatibility) REQUIREMENTS
Contact Allegro for information.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3



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